The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1995
Filed:
Oct. 04, 1994
Applicant:
Inventors:
Jun Etoh, Hachioji, JP;
Yoshinobu Nakagome, Hamura, JP;
Hitoshi Tanaka, Ome, JP;
Koji Kawamoto, Tottori, JP;
Masakazu Aoki, Tokorozawa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518909 ; 36518901 ; 36518906 ; 365226 ;
Abstract
An apparatus includes a constant voltage generator for generating a voltage based on a difference between threshold voltages of two MOS transistors, and a voltage sampling device for sampling the output voltage of the constant voltage generator circuit, wherein the voltage sampling device samples the output voltage of the constant voltage generator before an electric source switch for the constant voltage generator is turned off.